Barbara Erlandson was cruising along the information superhighway when she spotted her dream home on eRealty.com Erlandson, a marketing consultant in Leesburg, Va., saw images of a 200-year-old stucco house with hardwood floors and three fireplaces. That evening she drove by the house and, when she got home, dropped an e-mail to an agent at eRealty. The next day she visited the place with the agent and soon made an offer. A week after closing, she received a rebate check from eRealty for $4,250, equal to 1% of the purchase price.
For eRealty and other online brokerages, that's the...